Fast writer? (5)
I believe the answer is:
swift
I believe this clue is a double definition.
'fast' is the first definition.
(similar in meaning)
'writer?' is the second definition.
(Jonathan Swift, 1667-1745)
(Other definitions for swift that I've seen before include "like a cheetah?" , "Jonathan ..., clergyman and satirist" , "Expeditious" , "flying" , "Rapid - writer - bird" .)